Which of the following statements is true about a population pyramid?

Group of answer choices

It combines weighted information about morbidity and mortality, and it is expressed in terms of the numbers of healthy years lost.

It is essential for the understanding of dependency ratios and retirement policy problems.

It measures the years lived in good health and is used to calculate healthy adjusted life expectancy.

It measures the average equivalent number of years lost due to bad health and disability.

It is a graphical presentation of the health structure of the population.